Abstract:

In recent years, as an indoor positioning benchmark, geomagnetism has become a hot research field. This paper deeply studied geomagnetic indoor positioning technology,analyzed the interference of the indoor magnetic materials and electronic equipment to the magnetic field by a large number of experiments, and explored the characteristics of indoor magnetic field to prove the feasibility of magnetic field information as a basis for positioning; developed a data acquisition platform for intelligent geomagnetism using Arduino IDE. The platform is equipped with a variety of sensors, such as the HMC5983 magnetic sensor, inertial navigation sensors and so on. We can use it to collect the geomagnetic data of a certain density, and use the Kriging method to process the difference of geomagnetic data. The final result is the generation of 2 cm interval of the size of the grid geomagnetic map to become the indoor positioning reference map stored in the database.

Key words: magnetic field, indoor positioning, data acquisition, Kriging method, geomagnetic reference map